WAM

Analysis of Recording Elements in Wide Area Monitoring Systems

Recording of different types of power system events is extremely important for the successful analysis of wide are disturbances and the verification of  the system models used in the design of protection and emergency control systems. The paper discusses the recording elements in different types of multifunctional Intelligent Electronic Devices. The effect of analog and digital filtering, sampling rate, recording and storage methods on the quality of the records is analyzed in the paper. 
Even that the recording of analog values is the primary function of disturbance recording devices, the capture of change of state of monitored binary inputs is also important for the analysis of the operation of substation primary or secondary equipment. Methods for detection and their effect on the accuracy of time-stamping are presented in the paper.
IEC 61850 is the new international standard for communications in substations. More

Relion advanced protection & control.
BeijingSifang June 2016